Comparison of fracture behavior between acrylic and epoxy adhesives

Imanaka, Makoto; Li, Xinwei; Kimoto, Masaki

doi:10.1016/j.ijadhadh.2017.02.011

Cited by 11 publications

(2 citation statements)

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“…This process results in a resin with improved mechanical properties that, in combination to the low shrinkage attained, offers the highest stability. Furthermore, it can also provide greater resistance in coating surfaces and higher adhesion strength, making the resultant resins suitable for several industrial applications such as paints, adhesives, high-performance membranes, and so on [34,35,36].…”

Section: Introductionmentioning

confidence: 99%

Optimization of the Curing and Post-Curing Conditions for the Manufacturing of Partially Bio-Based Epoxy Resins with Improved Toughness

et al. 2019

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This research deals with the influence of different curing and post-curing temperatures on the mechanical and thermomechanical properties as well as the gel time of an epoxy resin prepared by the reaction of diglycidyl ether of bisphenol A (DGEBA) with an amine hardener and a reactive diluent derived from plants at 31 wt %. The highest performance was obtained for the resins cured at moderate-to-high temperatures, that is, 80 ° C and 90 ° C , which additionally showed a significant reduction in the gel time. This effect was ascribed to the formation of a stronger polymer network by an extended cross-linking process of the polymer chains during the resin manufacturing. Furthermore, post-curing at either 125 ° C or 150 ° C yielded thermosets with higher mechanical strength and, more interestingly, improved toughness, particularly for the samples previously cured at moderate temperatures. In particular, the partially bio-based epoxy resin cured at 80 ° C and post-cured at 150 ° C for 1 h and 30 min, respectively, showed the most balanced performance due to the formation of a more homogeneous cross-linked structure.

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Section: Introductionmentioning

confidence: 99%

Optimization of the Curing and Post-Curing Conditions for the Manufacturing of Partially Bio-Based Epoxy Resins with Improved Toughness

et al. 2019

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“…When interpreting the data obtained from joint specimens, it should also be remembered that most of the adhesive is subjected to a triaxial stress state which, apart from increasing the stiffness, will probably affect the yield or failure behaviour. The triaxial stress state depends on the adhesive itself, as was shown in Imanaka et al [56] for an epoxy and an acrylic adhesive. The popular belief that an adhesive has different properties in bulk or in joints is essentially due to the fact that, in almost all bonded specimens, the adhesive layer is in a complex and non-uniform state of stress [57].…”

Section: Bulk Structural Adhesive or Joint Testing?mentioning

confidence: 84%

Review of fatigue of bulk structural adhesives and thick adhesive joints

Zuo

Vassilopoulos

2020

International Materials Reviews

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Fatigue of structural adhesives has been investigated through joints and a little number of works investigate bulk adhesive behaviour itself. Aerospace and automotive engineering focuses more on joint configuration studies, which are correlated with practical applications. Previous works showed that for thin adhesive joints, material properties measured by bulk adhesive testing and joint testing are similar despite the triaxial stress states developing in the adhesive bondlines. However, with the introduction of structural adhesives in construction industry, thicker bondlines have emerged where the bulk adhesive material dominates the joint behaviour. This review work summarises works on the fatigue of bulk structural adhesives used mainly in the construction industry investigating structural adhesives fatigue behaviour either through experiment on joints or on bulk adhesive specimens. The work focuses on thick adhesive bondlines in joints, and discusses the controversy that is over whether adhesive properties from joints or from bulk material should be used.

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